RT9218B

6

DS9218B-09 March 2007

www.richtek.com

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Error Amplifier (GM)

E/A Transconductance

--

0.2

--

ms

Open Loop DC Gain

--

90

--

dB

Linear Regulator

DRV Driver Source

--

1.4

--

mA

Reference Voltage

0.792

0.8

0.808

V

Upper Gate Source

0.6

1

--

A

Upper Gate Sink

--

4

--

Ω

Lower Gate Source

0.6

1

--

A

Lower Gate Sink

--

3

4

Ω

Dead Time

--

--

100

ns

Protection

FB Under-Voltage Trip

FB Falling

70

75

80

%

FBL Under-Voltage Trip

70

75

80

%

OC Current Source

--

40

--

μA

Soft-Start Interval

--

3.5

--

ms

Power Good

Power Good Rising Threshold

--

90

--

%

Power Good Hysteresis

--

10

--

%

PG Sink Capability

--

0.2

0.4

V

Power Good Rising Delay

1

3

10

ms

Power Good Falling Delay

--

15

--

us

Note 1.

Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are

for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the

operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for

extended periods may remain possibility to affect device reliability.

Note 2.

Devices are ESD sensitive. Handling precaution recommended.

Note 3.

The device is not guaranteed to function outside its operating conditions.

Note 4.

JEDEC 51-3 thermal measurement standard.